On Sun, Sep 2, 2012 at 1:38 PM, Steven Bosscher <stevenb....@gmail.com> wrote:
> On Sun, Sep 2, 2012 at 1:22 PM, Uros Bizjak <ubiz...@gmail.com> wrote:
>> Hello!
>>
>> Attached patch prevents compute_bb_for_insn to calculate BB for
>> barrier RTXes. This is in fact the same approach all other
>> *_bb_for_insn use.
> What is happening for you, is that you're seeing a BARRIER between
> BB_HEAD(bb) and BB_END(bb), which is not possible. The barrier is
> mis-placed.
Please see how the dump looks:
(insn 12 11 28 3 (set (reg:SI 1 dx [63])
(const_int 2 [0x2])) pr54455.c:5 65 {*movsi_internal}
(nil))
(note 28 12 29 3 NOTE_INSN_EPILOGUE_BEG)
(insn/f 29 28 30 3 (set (reg/f:DI 6 bp)
(mem:DI (post_inc:DI (reg/f:DI 7 sp)) [0 S8 A8])) pr54455.c:13 -1
(expr_list:REG_CFA_DEF_CFA (plus:DI (reg/f:DI 7 sp)
(const_int 8 [0x8]))
(nil)))
(jump_insn 30 29 31 3 (simple_return) pr54455.c:13 -1
(nil)
-> simple_return)
(barrier 31 30 15)
(note 15 31 21 ("lab") NOTE_INSN_DELETED_LABEL 3)
(note 21 15 24 NOTE_INSN_DELETED)
(note 24 21 0 NOTE_INSN_DELETED)
Please note that we have a bunch of notes at the end, and barrier
above them. There are no active insns between barrer and BB_END. Where
should this RTX go?
Uros.
